Q: Chats don't get logged:
Check the 'stchatlog.dll' file in the Domino program directory via Explorer, ie. bring up Properties dialogbox for that file.
On the 'version' tab of the properties dialogbox, make sure that the Description is "Instant IMtegrity for IBM Lotus Sametime" and the Copyright is from Instant Technologies. If this is not the case, it is likely that the IMtegrity logging .dll got overwritten by a dummy .dll file from IBM.